In its effort to uphold the 1998 Child Online Protection Act (COPA), the U.S. Department of Justice is leaving no stone unturned. Its widely reported issuance of subpoenas to Internet search companies AOL, MSN, Google, and Yahoo is just the tip of the iceberg: The government has demanded information from at least 34 Internet service providers, search companies, and security software firms.

Responding to a Freedom of Information Act request filed by InformationWeek, the Department of Justice disclosed that it has issued to subpoenas to a broad range of companies that includes AT&T, Comcast Cable, Cox Communications, EarthLink, LookSmart, SBC Communications (then separate from AT&T), Symantec, and Verizon.

Asked which companies objected to, or sought to limit, these subpoenas, Department of Justice spokesperson Charles Miller declined to comment because the litigation is ongoing. He also declined to comment on utility of the information gathered by the government.